Transportation NOx emissions in the U.S. 1990-2023

Nitrogen oxides (NOx) emissions from the transportation sector in the United States from 1990 to 2023

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Release date

February 2024


United States

Survey time period

1990 to 2023

Special properties

Including highway vehicles and off-highway vehicles

Supplementary notes

* The higher emissions in 2006 are due to a method change and not because of real increases in NOx emissions from mobile sources.

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